AW00097603000 Color Creation and EnhancementBasler aviator GigE 1098 Color Creation andEnhancementThis chapter provides information about how color images are created on color camera models andabout the features available for adjusting the appearance of the colors.8.1 Color CreationThe sensor used in the cameras is equipped with an additive color separation filter known as aBayer filter. The pixel data output formats available on color cameras are related to the Bayerpattern, so you need a basic knowledge of the Bayer filter to understand the pixel formats. With theBayer filter, each individual pixel is covered by a part of the filter that allows light of only one colorto strike the pixel. The pattern of the Bayer filter used on the camera is as shown in Figure 35 (thealignment of the Bayer filter with respect to the sensor is shown as an example only; the figureshows the "GB" filter alignment). As the figure illustrates, within each square of four pixels, one pixelsees only red light, one sees only blue light, and two pixels see only green light. (This combinationmimics the human eye’s sensitivity to color.)GBR GG BR GG BR GG BR GG BRGGBR GG BR GG BR GG BR GG BRGGBR GG BR GG BR GG BR GG BRGGBR GG BR GG BR GG BR GG BRGGR G R G R G R G RGBRGGBRGGBRGGBRGG RBG B G B G B G B GGBR GG BR GG BR GG BR GG BRGB GGBRGSensorPixelsFig. 35: Bayer Filter Pattern
